Boiler.



PATENTED DEC. 3, 1907.

- L. ROWAN.

BOILER.

APPLICATION FILED JAN.22, 1906. RENEWED MAR. 26; 1907.-

3 SHEBTS-SHERT 1- PATENTED DEC. 3, 1907.

L. ROWAN.

BOILER.

APPLIOATION FILED .numz, 190s. RENEWED MAR. 26, 1907.

3 SHEETS-SHEET 2.

PATEN TED DEC L. ROWAN.

BOILER.

APPLICATION FILED mmzz, 190s. RENEWED MAR. 26, 1907.

3 SHEETS-SHBE'1' 3.

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LLOYD ROWAN, OF SHAWNEETOWN, ILLINOIS.

BOILER.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed January 22' 1906I Serial No. 297.144. Renewed March 26. 1907. Serial No. 364.678.

T 0 all whom it may concern:

Be it known that I, LLOYD ROWAN, a citizen of the United States, residing at Shawneetown, county of Gallatin, State of Illinois, have invented certain new and useful Improvements in Boilers, of which the follow ing is a full, clear, and exact description, reference being had to the accompanying drawin s.

The object of my invention is to construct a boiler that is applicable for all heating and steam generating purposes, which boiler can be simply and cheaply constructed and wherein short lengths of boiler tube can be utilized.

A further object of my invention is to construct a boiler wherein the circulation of water is very ra id while the boiler is in use and which b0- er may be very readily cleaned.

To the above purposes my invention consists in certain novel features of construction and arrangement of parts that will be hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which:

Figure 1 is a perspective view of a boiler of my improved construction, the same being detached from the boiler setting. Fig. 2 is a vertical section taken on the line 2-2 of Fig. 1; Fig. 3 is a vertical section taken on the line 3-3 of Fi 1; Fig. 4 is a vertical section taken on the line 4-4 of Fig. 1 Fig. 5 is a perspective view of a corrugated furnace cylinder I make use of in my improved boiler; Fig. 6 is a perspective view of one of the tube sections I make use of in my improved boiler; Fig. 7 is a vertical section taken on the line 77 of Fig. 1 Fig. 8 is a perspective view of the front end of a modied form of the boiler; Fig. 9 is a cross-section analo ous to Fig. 3 and showing a further mod' cation of the boiler; Fig. 10 is a vertical section through the front end of a third modification of the boiler.

Referring by numerals to the accompanying drawings, 1 designates the outer shell of thefurnace portion of the boiler in the front end of which is located a hoad2 and in the rear end a head 3. Located within the shell 1 with their ends seated in the heads 2 and 3 are three corrugated furnace cylinders 4 and in each cylinder is located a set of grate bars 5. Secured to the rear end of the shell 1 and extending rearwardly a short distance therefrom is a shell 6 which forms the combustion chamber of my improved boiler, and formed in the lower end of this shell is an opening 7 from which leads downwardly a pipe 8 providing means for removing the soot and ashes from the combustion chamber.

The tube sections of my improved boiler each comprise a pair of hollow bars 9, all of which are spaced at equal distances apart, and uniting each pair of hollow bars is a series of tubes 10. Formed through the ends of the hollow bars are the horizontally arranged apertures 11. A number of these tube sections are arranged in series one upon the other immediately back of the combustion chamber previously described said sections are so positioned that they practically stand upon one corner, and each successive air of hollow bars 9 are arranged at right angles to the preceding pair and thus each succeeding set of tubes 10 are arranged at right angles to the preceding set. When thus positioned all of the apertures 11 in the ends of the hollow bars are in alinement with one another; and passing througheach corresponding set of apertures are bolts or tie rods 12 which have nuts located upon their rear ends and thus very securely and rigidly retain all of the tube sections together. The lower tube 10 of each set of a tube section may be left out in order to form a rectangular space such as 13 in the lowermost corner of all of the tube sections in order to form a clean-out space.

Extending longitudinally beneath the furnace and all of the tube sections is a pair of mud drums 14 and each of said drums is con nected to the shell 1 by means of a short vertical tube 15. Connecting the lower ends of the lower series of hollow bars 9 with the mud drums l l are short tubes 16. Extending longitudinally along each side of the furnace and along the sides of the tube sections is a feed pipe 17, and each pipe is connected to the shell 1 by a pair of short ipes 18. Connecting the ends of the hollow bars 9 at the sides of the tube sections with each feed pipe 17 are the short tubes 19 providing means for supplying water to each tube section.

Extending longitudinally above the shell 1 and above the tube sections is a steam drum 20 in which is arranged a pair of longitudinally extending return flues or tubes 21. Located against the rear tube section and against the rear of the steam drum 20 is a plate 22 and formed in the center thereof is an opening 23. Formed in said plate above this opening 23 are openings 24 that coincide with the tubes 21 through the steam drum, and a breeching 25 secured to the rear side of the plate 22 around the opening 23 leads upwardly around said openings 24. A p ate 26 corresponding to the plate 22 is located in front of the shell 1 and the front end of the drum 20, there being suitable openings through said plate 26 that coincide with the front ends of the flues 21. A breeching 27 located on the front side of the plate 26 leads upwardly from the front ends of the flues 21, said breeching being extended to the stack that carries off the smoke and products of combustion from the furnace. Connecting the front end of the steam drums 20 with the shell 1 is a pair of short pi es 28, and connecting the upper ends of tie top series of hollow bars 9 with said drum 20 are short tubes 29. Leading upwardly from the center of the drum 20 is a steam outlet pipe 30.

In the modification seen in Fig. 8, the shell 1 is provided with but a single furnace cylinder 4:,and a steam dome 31 extends upwardly from the shell 1, to which dome is connected the front end of the steam cylinder 20. This construction is particularly adapted for small marine boilers.

In Fig. 9 I have shown a construction wherein two of the steam drums 20 are utilized; each being provided with a pair of the return flues 21.

In Fig. 10 I have shown the first few hollow bars 9 immediately behind the shell 1 as having the tubes 10 dispensed with, and this construction provides for a combustion chamber immediately to the rear ofsaid shell without the provision of the shell 6.

When my improved boiler is in operation,

. fires are built upon the sets of grate bars 5 within the furnace cylinders 4 and the flames and heat from said fires together with the products of combustion pass rearwardly through the combustion chamber and from thence rearwardly between all of the crossed tubes 10 of the tube sections. From thence the smoke and products of combustion pass through theopening 23 in the rear plate 22 from thence upwardly through the breeching 25'through the openings 24 to and through the return tubes 21', and from thence through the openings in the front plate 26 into the breeching 27 and finally to the stack. Water from the feed pipes 17 passes into the shell 1 around the furnace cylinders by means of the short pipes 18, and the water also passes into all of the hollow bars 9 and the tubes 10 through the tubular connections 19. The water enters the steam drums 20 from the shell 1 through the pipes 28 and from the hollow bars 9 through the short pipes 29. Thus it will be seen how the water can freely circu late through all the tube sections andthrough the shell land steam drum 20 by means of the various connections, which circulation commences as soon as the water becomes heated from the fires located within the furnace cylinders 4. i

Boilers of my improved construction are especially applicable for heating purposes, although they may be advantageously used for stationary or marine purposes. The tube sections can be very cheaply and conveniently built as in their construction short lengths of tubes are made use of and the entire boiler can be very readily and cheaply constructed.

If desired, suitable oil burners may be arranged in the furnace cylinders and the jets of flame from said burners deflected rearwardly through the pipes of the tube sections.

Various modifications will readily suggest themselves to persons familiar with the art of building, boilers, which modificationsmay be carried out without departing from the tube sections, connections from said shells and tube sections to said steam drum and return flues extending throughout the steam drum, substantially as Specified.

2. A boiler constructed with a cylindrical shell, a series of furnace cylinders in said shell, a shell forming a combustion chamber to the rear of the first mentionedshell, a series of tube sections arranged at the rear of the combustion chamber, a steam drum extending longitudinally above the shells and tube sections, connections from said shells, and tube sections to said steam drum, return flues extending throughout the steam drum, mud drums extending longitudinally beneath the shells and tube sections and tubular connections from said mud drums to the first mentioned shell and the tube sections, substantially as specified.

3. A boiler constructed with a cylindrical shell, a series of corrugated furnace cylinders arranged in said shell, a series of.vertically arranged tube sections at the rear of the shell, there being a combustion chamber formed between the shell and the tube sections, a steam drum arranged above the shell and tube sections, tubular connections from the shell and tube sections to said steam drum, return flues extending throughout the steam drum, mud drums extending beneath the shell and the tube sections, tubular connections from the mud drum to the shell and tube sections, and tubular connections for supplying Water to the shell and tube sections, substantially as specified.

- 4. A boiler constructed with a cylindrical shell, a series of furnace cylinders in said shell, a shell forming a combustion chamber at the rear of the first mentioned shell, a series of Vertically disposedtube sections arranged at the rear of the combustion chamber, a steam drum extending longitudinally 10 above the shells and tube sections, and connections from said shells and tube sections to said steam drum, substantially as specified.

LLOYD ROWAN. Witnesses:

GEORGE L. HANSTON, A. B. SWIFT. 

